The polar-orbiting AVHRR and Aqua-MODIS infrared sensors provide frequent views of a wide range of physical processes occurring at the sea surface, including: fronts, mesoscale eddies, currents and upwelling. Remote sensing of the marine environment is an established field, exploiting satellite data to study the development and distribution of oceanic processes (e.g. Haynes et al., 1993; Peckin...